All-printed organic transistors: integrating devices for flexible circuits (Conference Presentation)

Mahsa Sadeghi; Lilian Cardoso; Ana Claudia Arias

doi:10.1117/12.2276249

19 September 2017 All-printed organic transistors: integrating devices for flexible circuits (Conference Presentation)

Mahsa Sadeghi, Lilian Cardoso, Ana Claudia Arias

Proceedings Volume 10365, Organic Field-Effect Transistors XVI; 1036507 (2017) https://doi.org/10.1117/12.2276249
Event: SPIE Organic Photonics + Electronics, 2017, San Diego, California, United States

Abstract

Over the past several decades, conventional electronic circuits have been used for both analytical and digital logic circuits. Printed electronics has the potential to reduce fabrication complexity of electronic circuits and using lower-cost and large area manufacturing techniques. The performance of film transistors (OTFTS) has also improved and these devices could be applied to circuit applications where the high performance, high speed, and high energy consumption offered by conventional electronics is not needed. Amongst many factors that govern circuit design, the scale factor (W/L) serves as a crucial variable for tuning a circuit performance. Here we present printing techniques developed in order to adjust aspect ratios of printed transistors using solution processed electronic materials on to flexible substrates. By combining high-speed doctor blade and surface energy patterning we can demonstrate arrays of OTFTs that are later integrated to form circuits. In the surface energy patterning process, a hydrophobic self-assembled monolayer is deposited on a plastic substrate, and plasma etching is used to create hydrophilic regions. The desirable ink is deposited on the hydrophilic regions using doctor blading and only hydrophilic regions are patterned with the ink. Device aspect ratios are increased and controlled by patterning intermitted SD electrodes and controlling the size of the semiconductor island. We utilize screen printing method to interconnect devices to demonstrate several circuit designs such as enhancement-load Inverter, NAND and NOR on the same printing batch. We will discuss how machine learning is used to train this circuits and applied to sensing applications.

Conference Presentation

Citation Download Citation

Mahsa Sadeghi, Lilian Cardoso, and Ana Claudia Arias "All-printed organic transistors: integrating devices for flexible circuits (Conference Presentation)", Proc. SPIE 10365, Organic Field-Effect Transistors XVI, 1036507 (19 September 2017); https://doi.org/10.1117/12.2276249

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KEYWORDS

Electronics

Optical lithography

Printing

Transistors

Digital electronics

Electronic circuits

Flexible circuits

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